Acetylene as a Dicarbene Equivalent for Gold(I) Catalysis: Total Synthesis of Waitziacuminone in One Step
作者:Dagmar Scharnagel、Imma Escofet、Helena Armengol‐Relats、M. Elena Orbe、J. Nepomuk Korber、Antonio M. Echavarren
DOI:10.1002/anie.201915895
日期:2020.3.16
The gold(I)-catalyzed reaction of acetylene gas with alkenes leads to (Z,Z)-1,4-disubstituted 1,3-butadienes and biscyclopropanes depending on the donor ligand on gold(I). Acetylene was generated in situ from calcium carbide and water in a user-friendly procedure. Reaction of acetylene with 1,5-dienes gives rise stereoselectively to tricyclo[5.1.0.02,4 ]octanes. This novel double cyclopropanation has
金 (I) 催化乙炔气体与烯烃的反应生成 (Z,Z)-1,4-二取代的 1,3-丁二烯和双环丙烷,具体取决于金 (I) 上的供体配体。乙炔是通过用户友好的程序由电石和水原位生成的。乙炔与 1,5-二烯反应立体选择性地生成三环[5.1.0.02,4]辛烷。这种新型的双环丙烷化反应已应用于以乙炔和香叶基丙酮为原料一步全合成天然产物waitziacuminone。